For a long time, Avestan Algae is the collective name given to a range of Terran and Terran-Avestan hybrids of photosynthetic eukaryotic organisms that are grown for Seedling consumption. Algae is incredibly efficient in transforming the energy of the Tau Ceti sun into a source of both food and combustible fuel.
Algae is most easily grown in a Growbox, but can also be found naturally in water but it is advised against consuming this. The operation of the Growbox ensures rapid and pure growth of the cells.
Often Algae is grown alongside legumes due to their symbiotic relationship and because Algae is so resourceful at extracting nitrogen from the atmosphere, cutting out the need for the legumes to be fertilized artificially.
Algae can have various uses and functions, but the most common is as a food source for Seedlings. The others include as a fuel (once refined), an animal feed source, bioremediation and even pollution mitigation.
Algae was one of the first Terran crops grown on the planet and as such is as Avestan as anything else. It has been known to incorporate the distinct hues of various parts of the planet. It has influenced Seedling cutlery and customs and is a further reason why Seedlings are not known to like swimming in nature.